Water-tube boiler.



11, 1 Mam 7,

Patented Mar. 30, 1915.

I/VVEA/fil? 22B) #434 mm DAVID S. JACQB'US, F JIEIREEY CITY, NEW JERSEY,ASSIGNG'EL T9 THE. "L AB'JUCK r.-

.Qggeliceticn 111cc. somber $61, EH23.

To all whom it may concern:

Be it known that lQDA /rn S. Jziconns, a. citizen of the United States,residing at Jersey City,-in the county'otf Hudson and State of NewJersey, hsveiinvented new and useful improvements in l f Tube Boilers,of which the following is s specification. 1

My invention relates to Water tube boilers object an increase of eiii-'ciency and capacity in installations of large units. This object isacconiplishecl by (3011? bining two units each comprising a. hunk ofinclined Water tubes srrsnged syn1rnetrically above a common fuel andcombustion chamber, the fuel chamherextending from one side of theboiler to the other to provide a large furnace volume, and the heatingsurfaces of the units disposed. relative to each other so as to form ii-shaped conr hustion chamber which shell he open the escape of theprecincts of combustion, over the tubes of the heating surf-see, eionothe upper portions of the inclineii. sides or the combustion chamber.

The invention will be understood by rei? erence to. the accompanyingdrawings in which Figure 1 is a longitudinal section; unci Fig. 2, adetail View of the means for protecting the lower ends of the upperheaders.

in Fig; 1, l have shown two units eachv comprising 22. hunk of inclinedWater tubes, the tubes 1. of the left h m-(l unit being expanded intolower and upper headers 52 and 3, and the tubes 4c of the right handunit be ing expenclecl into lower anal upper headers 5 and 6. Theseheaders extend. transversely of the boiler from one side Wei} of the setting to the other sicie Wall. lie-ch hank is divided by transverseheilies 8, the bzzfiles 7 rising from baffles 9 extending the frontheaders towercl the rear, thus providing it plurality of transversePLSSBS for the products of combustion across and ELIOUTNi the tubes asinrlice'teci by the arrows. The upper headers 3 ere connected, bysubstuntielly horizontal separator tubes 10, with a steam and. Water(lrum ii, and latter is connected with headers 2 by clowncomers 12. iheupper, headers 6 are connected. by substontieily horizontzii separatortuhes L3, with e steam and Water drum 11,4, and the lat er is connecteclwith new WATER-TUBE 1 ,jiggkqyfi "3 a Specificetion of Letters Patent.

the lower headers 5 nu. no. urns l l-i,

approved type. 'Iihe 1o. two trunsi rse boxes connected '15 ,J. 7. I! He eiieeneho, lei-shaped tubes,

of each superheeter is co; 5:; space of the corresponrli The boilerunits show, escr over a common furnace e from the front to the rear oithe he. the design shown the furnace is ulong; its center o 2. low Wellfrom one side W311i to other. serves as e rear Welli'or the two instancetwo chain sections, in ii. gm stolrers 19 and 20 of any spp oveiconstrue '75 and operated incle e Ji each other, from thefrcnt one oneother i d nns rower heed. ere, anal are shown outsicie or the ignitiongo arches 21 and 22, iiherethe ere protecterl. from the heat of thefurnace; The heerlers 8 and 6 extend to the roof of r between them.

The two boiler are so rii poseci relative to each other that the upperheaders 3 and 6 converge toward each clown Wardly and their lower endsmeet 21 mutely at the transverse plane of the setting. virlerl a inrgefii-shnpeii combustion. c open to the escape of the pro cornl tion alongthe u; per port inclined sicles, that is, the opts.

vertical There is thus prothe inclined tubes. The gases combustionchamber rhvirie and pa boxes 26 below the wall 18 with the circulation,For such purpose I have shown them connected by pipes 27 and 28 with thelower and upper headers;

The coal is fired at the front and rear of the boiler setting, and withthe arrangement described the character of the combustion may bemaintained substantially constant from one side of the boiler to theother, .and the loss often experienced through a stream or lane ofexcess air or unconsumed combustible gases passing through the boilerand escaping to the stacks will be avoided. It is well-known amongengineers that-in ordinary boiler furnaces the-re is a reat variation inanalyses taken from di erent points in the path of the flue gasesleaving the furnace, Whereas with the present furnace arrangement thisaction is reduced to a minimum,

' as any irregularity from the front to the rear of the gratesdisappears before the gases pass from the upper part of the combustionchamber, and as the composition of the gases for uniform firingconditions will be uniform from one side of the boiler to the other, itfollows that the composition .of the entire volume of the gases leavingthe furnace will be substantially uniform.

The angle of inclination of the tubes of v the heating surfaces'isapproximately to the horizontalfand the planesof the rear headersapproximately at an angle of 90 to each other. I do not, however,restrict" myself to these angles, the essential feature being thedisposition of the units relative to each other over a common furnaceand com bustion chamber. to provide an A-shaped combustion chamber ofrelatively large* volume, and the other features herein described, whichcontribute to an increased efficiency and economy in operation. I

It is necessary in the practical operation of the boiler to protect thelower ends of .the upper headers' from the radiant heat ofthe fire,otherwise these ends Would burn out on account of the accumulation ofsedimentinside of them. For this, purpose I have shown a special tile'30held up by iron rods or bolts 31 passing through holes in *the file, therods or bolts being attached to a suspension member 32 which rests oncross members '33. The lowermost ends of the rods or bolts are protectedby means of fire clay, or other material, which is introduced vided inthe tile.

A-shaped combustion chamber between the units, a steam and water drumfor each unit,

- ers into which said tubes are expanded, said units being so disposedthat the upper headers converge toward each other downwardly and extendupwardly to the roof of the setting, whereby there is formed a centrallydisposed A-shaped combustion chamber between the units, a steam andwater drum for each unit, substantially horizontal separator tubesconnecting the upper ends of the upper headers to the correspondingsteam and water drum, downcomers connecting said drums to the lowerheaders, and walls in .90 front of said downcomers and extending fromthe steam and water drums to the banks of tubes.

2. In a Water tube boiler, the combination of two units each'comprisingabank of inclined water tubes, upper and lower headers into which saidtubes are expanded, said units being so disposed that the upper headersconverge toward each other downwardly,

whereby thereis formed a centrally disposed substantially horizontalseparator tubes connecting the upper ends of the upper headers to thecorresponding steam and water drum, downcomers connecting said drums tothe lower headers, transverse bafiies dividing the banks of tubes into aplurality of passes beginning at the steam uptake end, walls extendingfrom the lower transverse bafiles to the steam and water'drums, asuperheater in the space above each bank of tubes, and pipes connectingsaid superheaters with the steam space of the corresponding drum.

3. In a water tube boiler, the combination of two units each comprisinga bank of inclined water'tubes, upper and lower headers into whichsaid vtubes are expanded, said units being so disposed that the upper headersconverge toward each other downwardly,

whereby there is formed a centrally disposed- A-shaped combustionchamber between the units, a steam and waterdrum for each unit,substantiallyhorizontal separator tubesconnectingthe upper ends of theupsaid well, and pipes connecting said boxes with the upper and lowerheaders of each unit.

i. In a water tube boiler, the combination of two units each. comprisinga bank of inclined water tubes, upper and lower headers into which saidtubes are expanded, said units being so disposed that the upper headersconverge toward each other downwardly,

whereby there formed :1 centrally disposed Ashaped combustion chamberbetween the units, and a refractory tile to protect the lower ends ofthe upper headers.

5, in a water tube boiler, the combination of two units each comprisinga bank of inclined water tubes, upper and lower headers into which saidtubes are expanded, said units being so disposed that the upper headerscon verge toward each other downwardly, whereby there is formed acentrally disposed fii-shaped combustion chamber between the units, arefractory tile to protect the lower ends of the upper headers,a steamand water drum for each unit, tubes connecting the upper ends of theupper headersvto said drums, and downcomers connecting said drums to thelower headers.

(3. In a water tube boiler, the combination oi two units each comprisinga bank of inclined water tubes, upper and lower headers into which saidtubes are expanded, said units being so disposed that the upper headersconverge toward each other downwardly, whereby there is formed acentrally disposed A-shaped combustion. chamber by tween the units, arefractory tile placed at the uppermost-part of the combustion chanr berto protect the lower ends of the upper headers, bolts passing throughsaid tile, and

a suspension member to which said bolts are attached.

7. In a water tube boiler, the con'ibination of two units eachcomprising a bank inclined water tubes, upper and lower headers intowhich said tubes are expanded, said units being so disposed that theupper head ers converge toward each other downwardly, whereby there isformed a centrally disposed A-shaped combustion chamber between theunits, a refractory tiie to protect the lower ends of the upper headers,and tiles encircling the upper ends of the lowermost tubes.

In testimony whereof I have hereunto signed my name in the presence oftwo subscribing witnesses.

niwin s. iocene,

Witnesses:

E. P, TERRY,

JOHN A. W. DIXON.

